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UID:20250910T132123EDT-9770ugSmlz@132.216.98.100
DTSTAMP:20250910T172123Z
DESCRIPTION:Title: Globally stable cylinders and fine structures for hyperb
 olic groups.\n\nAbstract: A hyperbolic group G is said to have globally st
 able cylinders if there exist integers K\,m and a collection of equivarian
 t (1\,K)-quasi-geodesics connecting every pair of points in G such that th
 e following holds. For any x\,y\,z in G\; the (aforementioned) quasi-geode
 sics connecting them form a tripod\, up to removing at most m balls of rad
 ius K centered along such quasi-geodesics. In short\, the property asks fo
 r the existence of a bicombing on G satisfying some very strong properties
  making the group look as close to a tree as possible. In 1995\, Rips and 
 Sela asked if torsion-free hyperbolic groups have this property\, and in 2
 022 Sageev and Lazarovich established it for cubulated hyperbolic groups (
 hyperbolic groups with a geometric action on a CAT(0) cube complex). I wil
 l discuss recent work with Petyt and Spriano showing that residually finit
 e hyperbolic groups admit globally stable cylinders.\n\n \n\n \n
DTSTART:20250910T190000Z
DTEND:20250910T200000Z
LOCATION:Room 1104\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Abdul Zalloum (Queen's University)
URL:/qls/channels/event/abdul-zalloum-queens-universit
 y-367431
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